If Luke and Leia had kids, before they figured out who they were to each other, would those inbred (Royalty and a hillbilly? Is it only the middle classes that look for nookie outside their familial group?) children would be extremely powerful force users?

Maybe that's why Jedi are not allowed to fall in love, because they're not allowed to breed becuase second generation jedi are too powerful to avoid courruption to the darkside?